Possibly to do with the requirement of handling 10-bit colour data for HDRs pipeline? If NVidia's cache and register structure on their consumer parts is optimised more strictly for 8-bit colour data then it's understandable there could be a performance hit from HDR.
Was just gonna suggest that a driver fix will probably solve this.
AMDs driver are alot more long in the tooth with nvidia seeming to put out new drivers every other day (slight exaggeration).
Was just gonna suggest that a driver fix will probably solve this.
AMDs driver are alot more long in the tooth with nvidia seeming to put out new drivers every other day (slight exaggeration).